问题
解答题
选择合适的方法计算
|
答案
①10.8-0.8÷(0.35+0.05),
=10.8-0.8÷0.4,
=10.8-2,
=8.8;
②8×[1÷(2.3-2.25)],
=8×[1÷0.05],
=8×20,
=160;
③2.64×9.9+0.264,
=0.264×99+0.264,
=0.264×(99+1),
=0.264×100,
=26.4;
④18×(
+1 6
-1 3
),1 2
=18×
+18×1 6
-18×1 3
,1 2
=3+6-9,
=0.